topic 2 organisation

Question 1

what do phloem tubes transfer

Answer 1

food substances (mainly dissolved sugars) made in the leaves to the rest of the plant for immediate use or for storage

Question 2

what are phloem tubes made of columns of

Answer 2

elongated living cells with small pores in the end walls to allow cell sap to flow through

Question 3

what is translocation

Answer 3

the movement of sugars up and down a plant in phloem tubes

Question 4

what are xylem tubes made out of

Answer 4

• dead cells joined end to end with no end walls between them and a hole down the middle
• they are strengthened with a material called lignin